After you learned how to hold the guitar. the firs lesson is to play the chromatic scale, which means playing all the frets. at the first position.
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The chromatic scale may not sound like a lot of fun. It is simply a
learning skill. It's an important warming skill as well. So use this to learn and know this is one exercise that improves your playing
dramatically, so put up with a little time playing the chromatic scale
everyday.
There are 12 tones in Western
musical system. A tone can also be called a pitch. Pitch is the relative highness or lowness of a tone.